import { NavigationBehaviorOptions, UrlTree } from '@angular/router';
import * as i0 from "@angular/core";
export declare class SneatNavService {
    private readonly router;
    private readonly location;
    private readonly navController;
    private previous?;
    constructor();
    goBack(url: string | UrlTree, extras?: NavigationBehaviorOptions): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<SneatNavService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SneatNavService>;
}